Has anyone managed to get a formal project to use a story point style complexity for burnup/burndown reports

 Has anyone managed to get a formal project to use a story point style complexity for burnup/burndown reports?I have tested it this morning, my process was.
1.      Create a new formal project
2.      Create a new complexity enumeration using the story points as the values
3.      Create a story points attribute, using the same ID as the SCRUM template ‘com.ibm.team.apt.attribute.complexity’ and point it to the complexity enumeration
4.      Add it to the Business need work item (as this is the out of the box plan item)
5.      Change the Story points attribute to be a plan attribute, and then set the complexity attribute to be the story points attribute in the project settingsIt works with quickplanner & normal planning views but out of the box reports don't work (release burndown etc or with report builder). Has anyone got any ideas?